Three-dimensional basalt fiber net reinforced PCCP (prestressed concrete cylinder pipe)

Abstract

The utility model provides a three-dimensional basalt fiber net reinforced PCCP (prestressed concrete cylinder pipe) which comprises four structural layers, each structural layer comprises a concrete pipe core, a steel cylinder, a bearing structural layer and an outer protective layer, and the three-dimensional basalt fiber net reinforced PCCP further comprises a three-dimensional basalt fiber net; the concrete pipe core comprises an inner-layer concrete pipe core and an outer-layer concrete pipe core, a steel cylinder is connected between the inner-layer concrete pipe core and the outer-layer concrete pipe core, and the inner-layer concrete pipe core is the innermost layer; the bearing structure layer comprises a prestressed steel wire which is wound on the outer wall of the outer-layer concrete pipe core; the outer protection layer is the outermost layer and is arranged on the outer side of the bearing structure layer; the three-dimensional basalt fiber net is of a three-dimensional net structure, and a plurality of uniform meshes are distributed in the three-dimensional basalt fiber net. According to the three-dimensional basalt fiber net reinforced PCCP disclosed by the utility model, the tensile property and the bending resistance of the PCCP are greatly improved, and the deformation capacity of concrete is improved.

Description

Technical Field

[0001] The utility model belongs to the field of prestressed concrete cylinder pipes, and particularly relates to a PCCP reinforced by a three-dimensional basalt fiber mesh. Background Art

[0002] A prestressed concrete cylinder pipe (abbreviated as PCCP) is a water conveyance pipe made by winding circumferential prestressed steel wires on a high-strength concrete pipe core with a steel cylinder, and then spraying a dense cement mortar protective layer thereon. Fiber-reinforced concrete is a cement-based composite material formed by adding various fibers to concrete materials and fully stirring. Currently, on the market, there are countless types of fibers and many types of fiber products, and generally, chopped fibers and fiber cloths are used. Among the commonly used chopped fibers, steel fibers have a large density, are often unevenly mixed in cement concrete, are prone to sinking to the bottom, and are prone to agglomeration during stirring, resulting in poor workability of the concrete. Steel fiber concrete has a large self-weight and is prone to rusting. A large amount of steel is used in manufacturing, increasing the consumption of steel and the cost.

[0003] Currently, the dosage of fibers in concrete can only improve the performance of concrete within a certain range. Once it exceeds a certain volume dosage, it will no longer improve the workability of the concrete. In addition, the surface of the fibers is smooth, and sand and gravel are added to the concrete, which will inevitably affect the bonding between the two. Therefore, when a fiber-reinforced concrete member undergoes mechanical failure, even if the fibers have good tensile capacity, the concrete cannot provide a reliable binding force, and ultimately, the fibers will slip without breaking, unable to fully exert the excellent performance of the fibers. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a PCCP reinforced by a three-dimensional basalt fiber mesh to solve the problem that the excellent performance of the fibers cannot be fully exerted due to the dosage of the fibers in the concrete.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] The utility model provides a PCCP reinforced by a three-dimensional basalt fiber mesh. The PCCP reinforced by the three-dimensional basalt fiber mesh is divided into four structural layers, and the structural layers include a concrete pipe core, a steel cylinder 4, a load-bearing structural layer 3, and an outer protective layer 5. The PCCP reinforced by the three-dimensional basalt fiber mesh further includes a three-dimensional basalt fiber mesh 2 as a reinforcing material;

[0007] The concrete pipe core includes an inner-layer concrete pipe core 6 and an outer-layer concrete pipe core 7. A steel cylinder 4 is connected between the inner-layer concrete pipe core 6 and the outer-layer concrete pipe core 7, and the inner-layer concrete pipe core 6 is the innermost layer;

[0008] The load-bearing structure layer 3 includes prestressed steel wires, and the prestressed steel wires are wound around the outer wall of the outer concrete pipe core 7;

[0009] The outer protective layer 5 is the outermost layer and is located outside the load-bearing structure layer 3;

[0010] The three-dimensional basalt fiber mesh 2 has a three-dimensional network structure and is distributed with a number of uniform mesh holes.

[0011] Furthermore, the single-layer thickness of the three-dimensional basalt fiber mesh 2 is set according to the actual thickness of the structure layer where it is located.

[0012] Furthermore, the number of layers of the three-dimensional basalt fiber mesh 2 is one layer.

[0013] Furthermore, when the number of layers of the three-dimensional basalt fiber mesh 2 is several layers, its actual number of layers is set according to the thickness of the concrete pipe core.

[0014] Furthermore, the three-dimensional basalt fiber mesh 2 is only added into the concrete pipe core.

[0015] Furthermore, the three-dimensional basalt fiber mesh 2 is only added into the outer protective layer 5.

[0016] Furthermore, the three-dimensional basalt fiber mesh 2 is added into both the concrete pipe core and the outer protective layer 5.

[0017] Furthermore, the diameter of the prestressed steel wire is 5 - 7 mm, the tensile strength is 1570 MPa, the spacing between the steel wires in the same layer is greater than or equal to 2 times the diameter of the prestressed steel wire, and the maximum center distance is less than or equal to 38 mm.

[0018] Furthermore, when the three-dimensional basalt fiber mesh-reinforced PCCP is an inner-lined prestressed concrete cylinder pipe and the diameter of the prestressed steel wire is greater than or equal to 6 mm, the maximum pitch of the wire winding is less than or equal to 25 mm.

[0019] Compared with the prior art, the three-dimensional basalt fiber mesh-reinforced PCCP of the present utility model has the following advantages:

[0020] (1) The basalt fiber in the present utility model has good tensile properties. When it is used as a reinforcing material and added to the concrete material, relying on the excellent tensile properties of the fiber itself, it can greatly improve the tensile and flexural properties of the concrete material, increase the deformation ability of the concrete, and reduce the influence of concrete cracking on the entire component.

[0021] (2) In the present utility model, the use of three-dimensional basalt fiber mesh is more effective than that of one-dimensional structure or direct addition of basalt fiber. Since the elastic modulus and deformation coefficient of basalt fiber are similar to those of concrete, the two are fused and stressed in the same way, which can greatly improve the tensile and flexural properties of the material and increase the deformation ability of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings forming a part of this utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0023] In the drawings:

[0024] Figure 1 is a stepped sectional view of the PCCP reinforced with three-dimensional basalt fiber mesh according to an embodiment of the present utility model;

[0025] Figure 2 is a half-sectional view of the PCCP reinforced with three-dimensional basalt fiber mesh according to an embodiment of the present utility model;

[0026] Figure 3 is a schematic diagram of the left part of the half-sectional view of the PCCP reinforced with three-dimensional basalt fiber mesh according to an embodiment of the present utility model;

[0027] Figure 4 is a schematic diagram of the right part of the half-sectional view of the PCCP reinforced with three-dimensional basalt fiber mesh according to an embodiment of the present utility model;

[0028] Figure 5 is an axonometric view of a single-layer three-dimensional basalt fiber mesh in the PCCP reinforced with three-dimensional basalt fiber mesh according to an embodiment of the present utility model;

[0029] DESCRIPTION OF THE REFERENCE NUMERALS:

[0030] 1, anchoring block; 2, three-dimensional basalt fiber mesh; 3, load-bearing structure layer; 4, steel cylinder; 5, outer protective layer; 6, inner concrete pipe core; 7, outer concrete pipe core. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0034] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0035] Refer to Figures 1-5 As shown, the anchoring block 1 is used to improve the anchoring ability of the prestressed steel wire and enhance the stability and safety of the PCCP pipe.

[0036] This embodiment provides a PCCP reinforced with a three-dimensional basalt fiber mesh. The PCCP reinforced with a three-dimensional basalt fiber mesh is divided into four structural layers. The structural layers include a concrete pipe core, a steel cylinder 4, a load-bearing structural layer 3, and an outer protective layer 5. The PCCP reinforced with a three-dimensional basalt fiber mesh also includes a three-dimensional basalt fiber mesh 2 as a reinforcing material; the concrete pipe core includes an inner concrete pipe core 6 and an outer concrete pipe core 7. A steel cylinder 4 is connected between the inner concrete pipe core 6 and the outer concrete pipe core 7, and the inner concrete pipe core 6 is the innermost layer; the load-bearing structural layer 3 includes prestressed steel wires, and the prestressed steel wires are wound around the outer wall of the outer concrete pipe core 7; the outer protective layer 5 is the outermost layer and is on the outside of the load-bearing structural layer 3; the three-dimensional basalt fiber mesh 2 is a three-dimensional network structure with a number of uniformly distributed mesh holes.

[0037] Basalt fiber has good tensile properties. When it is used as a reinforcing material and added to concrete materials, relying on the excellent tensile properties of the fiber itself, it can greatly improve the tensile and flexural properties of the concrete materials, increase the deformation ability of the concrete, and reduce the impact of concrete cracking on the entire component.

[0038] In this embodiment, a three-dimensional basalt fiber mesh is used as the reinforcing material and concrete is used as the base material to make PCCP. The three-dimensional basalt fiber mesh is firmly bonded to the cement concrete and is not prone to deformation and displacement. The addition of the three-dimensional basalt fiber mesh can significantly improve the impact resistance and load-bearing capacity of PCCP.

[0039] Basalt fiber has high strength, and its elastic modulus and deformation coefficient are similar to those of concrete. When it is used as a reinforcing material and added to concrete, and its stress is consistent with that of concrete, it can greatly improve the impact resistance and load-bearing capacity of concrete material products. However, when adding ordinary basalt fiber, the fiber surface is smooth, and the concrete cannot provide a reliable binding force, resulting in the phenomenon of fiber slipping without fracture. Compared with the one-dimensional structure, the three-dimensional basalt fiber mesh forms a whole, and there are gaps throughout the mesh. After grouting, the concrete fills it, which can extremely increase the adhesion between the concrete and the basalt fiber mesh, making it firmly bonded and not prone to deformation and displacement.

[0040] The three-dimensional basalt fiber mesh in this embodiment is made of the new high-tech material basalt fiber. The fragmented natural basalt ore is added to a furnace at 450 - 1500 °C, and after high-temperature melting, it is made into filaments through a wire-drawing process. The basalt fiber bars are processed and woven into a three-dimensional basalt fiber mesh through special equipment such as one-dimensional, two-dimensional, and three-dimensional. In actual use, it can be purchased from the raw material manufacturer.

[0041] In this embodiment, the vertical vibration method is used to make the concrete core of the PCCP. The mold bases are positioned and fixed in rows in the forming area. A crane is needed to lift the concrete hopper to pour concrete at different mold positions in the forming area. After pouring, the end face is manually trimmed, and then the curing cover is placed by the crane. Steam is passed through the steam pipeline beside the mold base for steam curing after the concrete core is formed. After curing, the curing cover is lifted and the mold is removed, and the production of the concrete core is completed.

[0042] There are two processes for the outer protective layer. One is the mortar protective layer. The mortar protective layer adopts the roller spraying method. The strength of the prepared protective layer mortar is not less than M45 grade. The cement used should be the same type as the cement of the concrete pipe core. The mortar is fully mixed in the forced mixer. After the mixing is completed, the roller spraying machine equipment sprays the mortar to the outer layer of the pipe core after the wire is wrapped according to the design requirements to form a dense mortar protective layer. The other is the concrete protective layer. When making the concrete protective layer, the outer surface of the concrete pipe core with a steel cylinder wrapped around the annular prestressed steel wire should be sprinkled with water to moisten it, and the concrete pipe core should be placed in a mold of corresponding specifications, and concrete should be poured to form an outer protective layer. The total molding time of each section of the protective layer concrete should not exceed the initial setting time of the cement.

[0043] When manufacturing three-dimensional basalt fiber mesh reinforced PCCP, the mortar protective layer thickness is generally 25mm, and if it is a concrete protective layer, it is generally 45-50mm. The overall thickness of the concrete core varies from 100-260mm. According to the design, the thickness of the steel tube is generally 1.5mm.

[0044] Specifically, in this embodiment, the single layer thickness of the three-dimensional basalt fiber mesh 2 is set according to the actual thickness of the structural layer in which it is located.

[0045] Specifically, in this embodiment, the three-dimensional basalt fiber mesh 2 has one layer.

[0046] Specifically, in this embodiment, when the number of layers of the three-dimensional basalt fiber mesh 2 is several layers, the actual number of layers is set according to the thickness of the concrete pipe core.

[0047] In actual manufacturing, the thickness and number of layers of the three-dimensional basalt fiber mesh are designed according to actual needs, and the multi-layer three-dimensional basalt fiber mesh is set according to the thickness of the concrete pipe core.

[0048] Specifically, in this embodiment, the three-dimensional basalt fiber mesh 2 is only added into the concrete tube core.

[0049] Specifically, in this embodiment, the three-dimensional basalt fiber mesh 2 is only added into the outer protective layer 5 .

[0050] Specifically, in this embodiment, the three-dimensional basalt fiber mesh 2 is added into the concrete core and the outer protective layer 5 .

[0051] In actual manufacturing, there are three solutions for adding three-dimensional basalt fiber mesh:

[0052] 1. Only the concrete core is added with three-dimensional basalt fiber mesh. It is added into the mold and concrete is poured to form it.

[0053] 2. The three-dimensional basalt fiber mesh is only added to the outer protective layer. There are two processes for the addition method: (1) Connect the two sides of the three-dimensional basalt fiber mesh to form a cylindrical shape, slip it onto the correspondingly sized filament-wound core pipe, and then directly roll and spray fine mortar on the outside. (2) Place the concrete core pipe wound with prestressed steel wires and the three-dimensional basalt fiber mesh in a mold, and pour concrete. After solidification, an outer protective layer is formed.

[0054] 3. The three-dimensional basalt fiber mesh is added to both the concrete core pipe and the outer protective layer at the same time, and the addition process is the same as that in 1 and 2.

[0055] Specifically, in this embodiment, the diameter of the prestressed steel wire is 5 - 7 mm, the tensile strength is 1570 MPa, the spacing between the steel wires in the same layer is greater than or equal to 2 times the diameter of the prestressed steel wire, and the maximum center distance is less than or equal to 38 mm.

[0056] Specifically, in this embodiment, when the PCCP reinforced with the three-dimensional basalt fiber mesh is an inner-lined prestressed concrete cylinder pipe and the diameter of the prestressed steel wire is greater than or equal to 6 mm, the maximum pitch of the wire winding is less than or equal to 25 mm.

[0057] In the embodiment, the prestressed steel wires wound around the concrete core pipe are cold-drawn steel wire products. The diameter of the steel wire is 5 mm - 7 mm, and the standard value of the tensile strength is 1570 MPa. For the 7-mm steel wire with a gauge length of 210 mm in the torsion test, the number of turns of torsion is not less than 8 turns; for the 6-mm steel wire, the number of turns of torsion is not less than 9 turns; for the 5-mm steel wire, the number of turns of torsion is not less than 10 turns, and the fracture is a flat fracture. The spacing between the steel wires in the same layer shall not be less than 2 times the diameter of the steel wire, and the maximum center spacing shall not exceed 38 mm. For the inner-lined prestressed concrete cylinder pipe, when the diameter of the steel wire used is ≥6 mm, the maximum pitch of the wire winding shall not be greater than 25 mm. The prestressed steel wires are wound on the outer wall of the core pipe.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-dimensional basalt fiber mesh reinforced PCCP, characterized in that: The three-dimensional basalt fiber mesh reinforced PCCP is divided into four structural layers, the structural layers comprising a concrete pipe core, a steel cylinder (4), a load-bearing structural layer (3), and an outer protective layer (5), and the three-dimensional basalt fiber mesh reinforced PCCP further comprises a three-dimensional basalt fiber mesh (2) as a reinforcing material; The concrete pipe core comprises an inner concrete pipe core (6) and an outer concrete pipe core (7), a steel cylinder (4) is connected between the inner concrete pipe core and the outer concrete pipe core (7), and the inner concrete pipe core (6) is the innermost layer; The load-bearing structure layer (3) comprises prestressed steel wires, and the prestressed steel wires are wound around the outer wall of the outer concrete pipe core (7); The outer protective layer (5) is the outermost layer and is located outside the load-bearing structural layer (3); The three-dimensional basalt fiber mesh (2) is a three-dimensional mesh structure having a plurality of evenly distributed mesh holes.

2. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: The single layer thickness of the three-dimensional basalt fiber mesh (2) is set according to the actual thickness of the structural layer in which it is located.

3. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: The three-dimensional basalt fiber mesh (2) has one layer.

4. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: When the number of layers of the three-dimensional basalt fiber mesh (2) is several, the actual number of layers is set according to the thickness of the concrete pipe core.

5. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: The three-dimensional basalt fiber mesh (2) is only added into the concrete pipe core.

6. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: The three-dimensional basalt fiber mesh (2) is only added to the outer protective layer (5).

7. The three-dimensional basalt fiber mesh reinforced PCCP according to claim 1, characterized in that: The three-dimensional basalt fiber mesh (2) is added inside the concrete pipe core and inside the outer protective layer (5).

8. The three-dimensional basalt fiber mesh reinforced PCCP according to any one of claims 1 to 7, characterized in that: The diameter of the prestressed steel wire is 5-7 mm, the tensile strength is 1570 mm, the spacing between steel wires in the same layer is greater than or equal to twice the diameter of the prestressed steel wire, and the maximum center distance is less than or equal to 38 mm.

9. The three-dimensional basalt fiber mesh reinforced PCCP according to any one of claims 1 to 7, characterized in that: When the three-dimensional basalt fiber mesh reinforced PCCP is a lined prestressed steel cylinder concrete pipe and the diameter of the prestressed steel wire is greater than or equal to 6 mm, the maximum pitch of the wire winding is less than or equal to 25 mm.

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